冷轧机压下系统无模型控制器的设计与仿真分析

Design and Simulation Analysis of Model-free Adaptive Controller for Screw down System of Cold Strip Mill

针对板带冷轧机压下系统高阶非线性的特点,且在轧制过程中存在不确定性,为提高压下系统的位置精度,对传统的模糊PID控制器进行了算法改进,根据现场设备参数,建立了压下系统各部件的数学模型,采用无模型自适应算法进行控制器设计。仿真结果显示,无模型控制器在此系统下响应速度快,控制精度高,具有一定的噪声抑制能力,性能优于改造前的控制器,具有一定的推广价值。

Screw down system of cold strip mill has the characteristic of high order nonlinear, and the roll- ing processes are uncertain. In order to increase its screw down system position precision,its traditional fuzzy PID controller was improved. According to parameters of the spot,the mathematical model of screw down sys- tem was established, the controller was designed based on model-free adaptive control algorithm. Simulation re- sults show that model-free adaptive controller has fast response speed, high control precision, the ability of noise suppression, its performance is better than former controller, it is valuable to use and popularize.